WD
William Dunlap — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Ionia-County, Michigan
Our Model Tree links this William Dunlap across the 1930 and 1940 US Censuses in Ionia-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 7-person household.
Age 21
b. ~1919
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Ionia-County, Michigan |
| Surname | Dunlap |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Belding City |
| 1935 Residence (County) | Ionia |
| Additional Details | |
| Occupation | Laborer |
| Industry | Metal Mfg |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 670 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Laborer |
| Township / Ward | Belding City |
| Est. Birth Year | ~1919 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Thomas Dunlap | Son | — | 16 | ~1924 |
| Nora Dunlap | Spouse | — | 54 | ~1886 |
| Richard Dunlap | Son | — | 19 | ~1921 |
| William Dunlap | Son | — | 21 | ~1919 |
| Mary Dunlap | Daughter | — | 13 | ~1927 |
| Leo Dunlap | Head | — | 56 | ~1884 |
| Betty Dunlap | Daughter | — | 18 | ~1922 |
Census Appearances
1930
Ionia, Michigan
Son, age 11
Ionia, Michigan · implied b. ~1919 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dunlap |
| Given Name | William E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Ionia-County, Michigan
Son, age 21
Ionia-County, Michigan · implied b. ~1919 — 7 household members
| Surname | Dunlap |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Belding City |
| 1935 Residence (County) | Ionia |
| Occupation | Laborer |
| Industry | Metal Mfg |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 670 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links William Dunlap across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Dunlap
Son · 1940 · age 21 · b. ~1919 · Michigan
★ You are viewing this record
Sibling
Mary Dunlap
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Dunlap
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Dunlap
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Dunlap
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Ionia-County, Michigan
Open full size
1940 US Federal Census — Ionia-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01764-00068)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Harold Johnson | 36 | son | Paint Sprayer | Michigan |
| 42 | Hannah Glasser | 84 | mother | — | Massachusetts |
| 43 | Jake Hower | 69 | Head | — | Michigan |
| 44 | Lulu Hansen | 78 | Housekeeper | — | Iowa |
| 45 | Charles A. Dickson | 72 | Head | — | Michigan |
| 46 | Frances Dickson | 72 | wife | — | Michigan |
| 47 | Robert C. R. Moore | 40 | Head | Dye + Tool Maker | Michigan |
| 48 | Ethel M. Moore | 34 | wife | — | N. Dakota |
| 49 | Herbert Moore | 16 | son | — | Michigan |
| 50 | Ethel J. Moore | 15 | daughter | — | Michigan |
| 51 | Joseph Moore | 11 | son | — | Michigan |
| 52 | Marion Moore | 2 | daughter | — | Michigan |
| 53 | Charles Moore | 76 | Father | — | Michigan |
| 54 | Zala Meeker | 53 | Head | Manager | Michigan |
| 55 | Jean Meeker | 21 | daughter | — | Michigan |
| 56 | Frances Isham | 91 | mother | — | New York |
| 57 | Leo Dunlap | 56 | Head | — | Michigan |
| 58 | Nora Dunlap | 54 | wife | — | Michigan |
| 59 | William Dunlap THIS PERSON | 21 | son | Laborer | Michigan |
| 60 | Richard Dunlap | 19 | son | Laborer | Michigan |
| 61 | Betty Dunlap | 18 | daughter | — | Michigan |
| 62 | Thomas Dunlap | 16 | son | — | Michigan |
| 63 | Mary Dunlap | 13 | daughter | — | Michigan |
| 64 | Arthur Cary | 66 | Head | Foreman | Michigan |
| 65 | Grace Cary | 54 | wife | — | Michigan |
| 66 | Myrtle Cary | 24 | daughter | Laborer | Michigan |
| 67 | Donald Cary | 12 | son | — | Michigan |
| 68 | Robert Cockell | 73 | Head | — | Canada-Eng |
| 69 | J. John Delman | 58 | Head | Service Man | Michigan |
| 70 | Ada Delman | 55 | wife | — | Canada-Eng |
| 71 | Pearl Raby | 47 | Head | A.D.C. | Michigan |
| 72 | Manuel Raby | 21 | son | Laborer | Michigan |
| 73 | Edward Raby | 16 | son | New Worker | Michigan |
| 74 | Gordon Raby | 11 | son | — | Michigan |
| 75 | Roy Luce | 63 | Head | — | Michigan |
| 76 | Cora Luce | 63 | wife | — | Michigan |
| 77 | Clarence Luce | 38 | son | Salesman | Michigan |
| 78 | Trixie Drumb | 36 | Head | A.D.C. | Michigan |
| 79 | Russell C. Drumb | 15 | son | — | Michigan |
| 80 | Earl Ray Drumb | 9 | son | — | Michigan |
Related Census Records
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)